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G. M. GRAY.

SIGNAL LANTERN.

APPLICATION men MAY29.1915. RENEWED JAN. 3. 1919.

Patented May 27, 1919.

I l l l I l E l 1 l l l I I I UNITED STATES PATENT neuron.

GEORGE M. GRAY, OF MELROSE, MASSACHUSETTS.

SIGNAL-LANTERN.

Specification of Letters Patent.

Application filed May 29, 1916, Serial No. 100,519. Renewed January 3,1919. Serial No. 269,549.

To all whom it may concern:

Be it known that I, GEORGE M. GRAY, a citizen of the United States,residing in Melrose, county of Middlesex, Commonwealth of Massachusetts,have invented certain new and useful Improvements in Signail-Lanterns,of which the following is a specification, reference being had to thedrawings accompanying the same and forming a part thereof.

My invention relates to signal lanterns for railroads, vessels, and thelike.

One of the objects of my invention is to provide a powerful signallight, the light beams of which may be visible either day or night foreither short or long distances.

A further object of my invention is to provide an electric signal lamphaving a reflector of such curvature as to concentrate and project thelight rays of a light straight ahead in a comparatively narrow, powerfulbeam of light, so that it will be visible during the hours of daylightand so that the signal lamp may be used for what is known as daylightsignals.

Another object of my invention is to provide adjustable means formounting an electric light bulb in the signal lamp so that it may beadjusted laterally in any direction and any distance within the limitsof adjustment, as well as adjustable longitudinally.

In the drawings forming a part of this specification- Figure 1 is a rearelevation of the lamp;

Fig. 2 is a sectional side elevation through line 22, Fig. 1;

Fig. 3 is. a sectional plan view through line 33 Fig. 2; and

Fig. 4 is a. section through the socketholder for the electric bulbshowing an enlarged view of the means for adjusting the bulb laterallyand longitudinally.

The drawings illustrating the construction of my device show a metalsignal lantern body, and the numeral 1 is the outer body portion of thelamp; 2 is the top or ventilator portion; and 3 is the bottom portion ofthe lamp. The rear of the lamp is provided with a sliding cover or doort which has the angular return bent portions 4: on it, which slide overangular out-turned portions 1", formed on the body 1 of the lamp at therear. lamp has a sliding door 5 having angular return bent portions ateach side which slide we]: angular out-turned portions of the gularpieces 10, 10, etc.

The front portion of the body. The front slide or door 5 is providedwith a rondle-holder 6 in which the rondle glass 7 is secured.

There is mounted inside the lantern body a conical-shapedrefiectonholder 8 in which is secured the reflector 9, the reflectorbeing held by any suitable-means, such as the an- T he reflector 9 has acentral opening 11 through which the base 12 of an electric bulb 13 mayso as to be secured in the socket 14. The socket 14: is provided withthe threaded portion 15 having a locking-nut 16 so that the'socket 1stmay be adjusted longitudinally in and out of the socket bushing 17.bushing 17 has the hole for the socket 1% located eccentric to itsbearing portion 18 in order to provide means for lateral adjustment ofthe lamp socket 14:. The bushing 17 is revoluble and mounted in a secondrevoluble bushing 19, which in turn is mounted in the back part 20 ofthe cone 8.

The bushing 19 has a bearing hole eccentric to its bearing surface 21 sothat it will throw the socket 15 and the hole in the bushing 19laterally, as will be readily understood. The bushings 17 and 19 areprovided with shoulders 22 and 23 respectively so as to prevent endwisemovement of them in one direction, and they are held in position againstendwise movement in the other direction by the plate 24 which is securedto the bushing 19 and bears upon the inside of the rear wall 20 of thecone 8 and a plate 25 which is secured by the screw 26 to the bush ing17, Which plate 25 bears against the plate 2 1. These two plates 2 1 and25 secure the bushings 17 and 19 against endwise-'movement but permit oftheir rotation. The bushings 17 and 19 are secured against accidentalrotation by the dogs 27 and 28 which 29 being secured to the portion 20,and the Patented May 2'71, 191%,

This socket screw 30 to the bushing 19. These dogs 2? a and 28 have theangular points 81 and formed so as to enter notches in the peripheriesof the members 17 and 19. and when the points 31' and 32 areinengagement with the notches and the screws 29 and '30 tightened, themembers 17 and 19 are securely held in their adjusted position.

The bushings 17 and 19 serve to position the socket-holder 15 laterallyin any position desired from a position concentric with the bearing 21of the bushing 19 toth'e limit of throw permissible by theeccentricities 0t can be adjusted to the highest possible point.

the bearing holes in said bushings 17'and 19, the operation being asfollows ties of the two would be counteracted, as it were, to preventlateral movement of the socket and to cause a direct upward movement, orvertical movement, as viewed in Fig.1.

ontinuing these movements, the socket Likewise, if it is desired toadjust the bulb horizontally in either direction from the position shownin Fig. l, the inside bushing 17 would be rotated to the right if it wasdesired to adjust the socket-holder to the right, or to the left if itwas desired to ad just it to the left. When the proper adjustment in anydirection is made, then the points of the dogs. 27 and 28 are broughtinto engagement with the notches on the bushings 17 and 19, and thescrews tightened to hold said members in their adjusted position.

If it is desired to adjust thebulb longitudinally in and out withrelation to the reflector 9, the binding nut 16 is loosened and screwedoutwardly, and thereupon the socket-holderl5 may be rotated until theproper longitudinal adjustment has been obtained, whereupon the bindingnut 16 may be tightened to hold the socketin its adjusted position. Y

The signal lamp is shown in the illustrationsas it would be formed tomake use of electric light bulb. The socket 15 is of i the usual typeand is shown provided with a bayonet form of socket-holder to' take whatis known as the bayonet form of socket on an electric bulb. This sockethas two little pins projecting slightly from its periphery arranged toslide in the slots 33, 33, and interlock with the lateral portion of theslot 34:. lhe socket is substantially the same on both ends andlS'PI'0VlClBd with con tact members of the usual typeto contact messeswith the terminals of the filaments of the lamp at one end and contactwith terminals in the plug-.35 at its other end, the plug 35 beingprovided with connecting wires 36 and 37. i

The form of the socket-holder and plug 35 is of the usual type and I donot claim the same as part of my invention. My invention resides in theconstruction of the lamp body and reflector and the means for adjustingthe bulb laterally as well as longitudinally so as to properly focus thelight from the incandescent filament within the reflector in order thatthe light beams of the filament may be projected in the proper directionand concentrated so as to produce a long, narrow beam of light of suchintensity as tobe easily distinguished and visible in the daylight, aswell as at night.

What. I claim is 1. In a signal lamp the combination of a lanternbody,anapproximately parabolical curved reflector, an electric light holder,means for adjusting said electric light holder. comprising two eccentricrotatable bushings, one having a bearing within the other, means forrotating and securing the bushings in their-adjusted positions, andmeans for adjusting the electric light holder axially to focus the lightwith relation to the reflector.

2. In a lamp or lantern, a body portion, an approximately parabolicalcurved re- 35 flector mounted within the lantern body, an electric Lightholder, means for adjusting said electric light holder sidewise in alldirections comprisin two eccentric bushings revolubly mounted in thelantern body, means for rotating said bushings and for securing them intheir adjusted positions, and means for adjusting the electric lightholder axially omprising a threaded portion and a clamping nut, both forthe purpose of focusin the light with relation to the reflector.

ln testimony whereof, I have hereunto set my hand, in the presence oftwo subscribing witnesses, this the 26 day of May, A. D. 1916.

GEORGE M. GRA Y Witnesses:

R. P. Emo'rr, H. M. Knnso.

